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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Turbulence associated with corotating interaction regions at 1 AU: Inertial and dissipation range magnetic field spectra
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Turbulence associated with corotating interaction regions at 1 AU: Inertial and dissipation range magnetic field spectra

机译：与在1 AU处共同旋转的相互作用区域相关的湍流：惯性和耗散范围的磁场谱

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摘要

We examine five Corotating Interaction Regions (CIRs) observed during the recent solar minimum by the Advanced Composition Explorer spacecraft at 1 AU. We apply a familiar series of spectral examinations and compare quantities such as the variance anisotropy, spectral index, cross‐ and magnetic helicities, and the infered geometry of the wave vectors against established correlations seen in 1 AU turbulence apart from CIR regions. We find variance anisotropies that scale with plasma beta and spectral amplitude, spectral indices in the same familiar ranges, indices within the dissipation range scaling with the apparent rate of energy cascade within the inertial range, and the same linear relationship between cross‐ and magnetic helicities. As the results agree with earlier established correlations, we conclude that the rate of energy injection by large‐scale shear is sufficiently slow as to allow for significant reorganization of the injected energy by the turbulent cascade. This does not mean that there is no evidence of newly injected energy as a result of that large‐scale shear. Our companion paper argues that there is significant energy injection within the CIRs. This analysis only argues that energy injection is too slow to fully dominate the interplanetary spectrum.
机译：我们检查了先进成分探测器在1 AU观测到的最近太阳最低期间观测到的五个同向相互作用区域（CIR）。我们应用了一系列熟悉的频谱检查，并比较了诸如方差各向异性，频谱指数，交叉和磁螺旋度以及推断的波矢几何形状等数量与在1 AU湍流中除CIR区域以外的已建立的相关性。我们发现方差各向异性随等离子体β和光谱幅度变化，在相同熟悉范围内的光谱指数，在耗散范围内的指数随惯性范围内的能量级联表观速率成比例变化以及交叉和磁螺旋度之间的线性关系相同。由于结果与早先建立的相关性一致，我们得出结论，大规模剪切的能量注入速度足够慢，以允许湍流叶栅对注入的能量进行显着重组。这并不意味着没有证据表明这种大规模剪切会导致新注入的能量。我们的伴随论文认为，CIR内有大量的能量注入。该分析仅提出能量注入太慢而无法完全支配行星际光谱。

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